1# Obtaining Application and File System Space Statistics 2 3This topic describes how to obtain statistics on the space occupied by your application and the free space and total space of a file system. 4 5## Available APIs 6 7For details about the APIs, see [ohos.file.statvfs](../reference/apis/js-apis-file-statvfs.md) and [ohos.file.storageStatistics](../reference/apis/js-apis-file-storage-statistics.md). 8 9**Table 1** APIs for application and file system space statistics 10 11| Module| API| Description| 12| -------- | -------- | -------- | 13| \@ohos.file.storageStatistics | getCurrentBundleStats | Obtains the storage space of the current application, in bytes.| 14| \@ohos.file.statvfs | getFreeSize | Obtains the free space of a file system, in bytes.| 15| \@ohos.file.statvfs | getTotalSize | Obtains the total space of a file system, in bytes.| 16 17**Table 2** Attributes for application space statistics 18 19| BundleStats Attribute| Description| Directory for Statistics| 20| -------- | -------- | -------- | 21| appSize | Size of the application installation files, in bytes.| /data/storage/el1/bundle| 22| cacheSize | Size of the application cache files, in bytes.| /data/storage/el1/base/cache<br>/data/storage/el1/base/haps/entry/cache<br>/data/storage/el2/base/cache<br>/data/storage/el2/base/haps/entry/cache| 23| dataSize | Size of other files of the application, in bytes.| The files include local files, distributed files, and database files of the application.<br>- Local file directories (parent directories of the **cache** directories):<br>**/data/storage/el1/base**<br>**/data/storage/el2/base**<br>- Distributed file directory:<br>**/data/storage/el2/distributedfiles**<br>- Database directories:<br>**/data/storage/el1/database**<br>**/data/storage/el2/database**| 24 25## Development Example 26 27- Obtain the free space of **/data** of the file system. 28 29 ```ts 30 import statvfs from '@ohos.file.statvfs'; 31 import { BusinessError } from '@ohos.base'; 32 import common from '@ohos.app.ability.common'; 33 34 let context = getContext(this) as common.UIAbilityContext; 35 let path = context.filesDir; 36 statvfs.getFreeSize(path, (err: BusinessError, number: number) => { 37 if (err) { 38 console.error(`Invoke getFreeSize failed, code is ${err.code}, message is ${err.message}`); 39 } else { 40 console.info(`Invoke getFreeSize succeeded, size is ${number}`); 41 } 42 }); 43 ``` 44 45- Obtain the space occupied by the current application. 46 47 ```ts 48 import storageStatistics from "@ohos.file.storageStatistics"; 49 import { BusinessError } from '@ohos.base'; 50 51 storageStatistics.getCurrentBundleStats((err: BusinessError, bundleStats: storageStatistics.BundleStats) => { 52 if (err) { 53 console.error(`Invoke getCurrentBundleStats failed, code is ${err.code}, message is ${err.message}`); 54 } else { 55 console.info(`Invoke getCurrentBundleStats succeeded, appsize is ${bundleStats.appSize}`); 56 } 57 }); 58 ``` 59